<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>课程选择 - 校园选课系统</title>
    <style>
        body { font-family: Arial, sans-serif; background-color: #f4f4f4; padding: 20px; }
        form { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 0 10px rgba(0,0,0,0.1); }
        label { display: block; margin-bottom: 10px; }
        select { width: 100%; padding: 8px; margin-top: 5px; border-radius: 4px; border: 1px solid #ddd; }
        button { padding: 10px 20px; background-color: #0056b3; color: white; border: none; border-radius: 5px; cursor: pointer; margin-top: 10px; }
        button:hover { background-color: #004494; }
    </style>
</head>
<body>
<form action="/select_course" method="post">
    <h1>选择课程</h1>
    <label for="course_id">课程:</label>
    <select id="course_id" name="course_id">
        <option value="1">计算机科学导论</option>
        <option value="2">线性代数</option>
        <option value="3">英语</option>
    </select>
    <button type="submit">选择课程</button>
</form>
</body>
</html>
